The following flavonoid compounds have been isolated and identified from flowers of Urena lobata L.: kaempferol 3-O-(6-O-trans-p-coumaroyl)-β-glucoside (tiliroside), dihydrokaempferol 4'-O-β-glucopyranoside, kaempferol and quercetin 3-O-β-glucosides and 3-O-β-rutinosides also luteolin 4'-O-β-glucopyranoside. Their structures were established by conventional (acid, enzymatic and alkaline hydrolysis) and spectral analysis (UV, 1H NMR, 13C NMR). Chromatographical investigations indicated the presence of quercetin, kaempferol and kaempferol 7-O-glucoside.
flavonoid, quercetin, kaempferol, luteolin, Malvaceae, Urena lobata L., dihydrokaempferol glycosides, tiliroside
Journal NLM ID: 2985167RWWW link: https://ptfarm.pl/pub/File/Acta_Poloniae/1999/1/069.pdfPublisher: Polski Towarzystwo Farmaceutyczne
Institutions: Department of Pharmacognosy, Karol Marcinkowski University of Medical Sciences in Poznań 10 Sieroca Str., 61-771 Poznań, Poland
Methods: 13C NMR, 1H NMR, TLC, enzymatic hydrolysis, alkaline hydrolysis, UV, PC, HCl hydrolysis
Found